Sulfur dioxide measurements in the lower, middle and upper troposphere: Deployment of an aircraft-based chemical ionization mass spectrometer with permanent in-flight calibration

Speidel, M., R. Nau, F. Arnold, H. Schlager, and A. Stohl, 2007: Sulfur dioxide measurements in the lower, middle and upper troposphere: Deployment of an aircraft-based chemical ionization mass spectrometer with permanent in-flight calibration. Atmos. Environ., Volume 41, Issue 11, 2427-2437, doi: 10.1016/j.atmosenv.2006.07.047.